| I.P Abstract & Summary |
The present invention provides a functional pillow filled with filling, the functional pillow comprising the filling having a tetrahedron shape having three triangle flat faces; wherein the bottom of the tetrahedron shape is open, and the inside of the tetrahedron shape is an empty space; wherein the tetrahedron shape comprises: a protruding edge portion that connects adjacent two faces of the flat faces, that protrudes from each of the flat faces, and that has a semicircle pipe shape; an apex portion that connects three protruding edge portions and that has an opening; a groove that is formed in a center portion of an outer surface of each of the flat face, and a bump portion that is formed in an inner surface of each of the flat faces and that protrudes toward a center of the opening of the bottom. |
